/* 基础样式消除 */
body, html, h1, h2, h3, h4, h5, h6, 
ul, ol, li, dl, dt, dd, header, 
menu, section, p, input, td, th, ins {
    padding: 0;
    margin: 0;
}
    
a,a:hover{
    text-decoration: none;
}
    
ul,li{
    list-style: none;
}
   
em,i{
    font-style: normal;
}
   
.clearfix::before,.clearfix::after{
    content: "";
    display: table;
}